One of the more striking things about a spacewalk is the complete absence of sound. With no air to carry vibrations, the collisions and impacts that would be loud on Earth happen in total silence. You watch equipment clatter and bounce right in front of you; the motions look exactly as they would on the ground, yet nothing reaches your ears. The familiar soundtrack of metal on metal is simply gone, leaving a strange mismatch between what you see and what your Earth-trained senses expect.